My wife told me both the driver and his gf looked at us unable to believe in what they saw: The Polish DRIVER reading the map covering half of windshield and accelerating on the turn! (At least it looked that way to them, since they expected the driver seated at the right...) ;-)))))))))))))))
I must have had similar facial expression when I saw a car on English plates on an autobahn close to Poland and the passenger in the front seat was reading what looked like a newspaper (perhaps it was a map however) - the impression was even more distracting as we were overtaking them
Yep. Just wait for a very straight section of road, because you're going to have to overtake from deep (ie, so far back you can see the road ahead from the hedge).
That, or trust your passenger to give you the green light.
the passenger should have a bit experience in such judging if you don't want to end up in a head-on collission